阅读说明：本技术 一种不同氧浓度条件下煤粉爆炸性测试装置及其测试方法 (Device and method for testing explosiveness of pulverized coal under conditions of different oxygen concentrations ) 是由 王雅军 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种不同氧浓度条件下煤粉爆炸性测试装置,包括瓶身带有一个通气嘴的三角瓶,所述三角瓶的瓶口设置有橡皮塞,所述橡皮塞上插入式设置有两个第一玻璃管,2个所述第一玻璃管的下端均深入瓶内,2个所述第一玻璃管的上端分别通过软管连接氧气瓶和氮气瓶,且所述氧气瓶和氮气瓶的出口处安装有控制气体流量的流量表,所述三角瓶的通气嘴通过带弹簧夹的软管连接一根有一定长度的第二玻璃管,且所述第二玻璃管探入煤粉爆炸仪长管内。还公布了其测试方法。本发明结构简单,使用方便,能够方便快捷地进行一定氧浓度下煤粉爆炸性测试。(The invention discloses a coal dust explosiveness testing device under different oxygen concentration conditions, which comprises a triangular flask, wherein the flask body of the triangular flask is provided with a vent nozzle, the bottle opening of the triangular flask is provided with a rubber plug, two first glass tubes are arranged on the rubber plug in an insertion mode, the lower ends of 2 first glass tubes are deep into the flask, the upper ends of 2 first glass tubes are respectively connected with an oxygen cylinder and a nitrogen cylinder through hoses, flow meters for controlling gas flow are arranged at the outlets of the oxygen cylinder and the nitrogen cylinder, the vent nozzle of the triangular flask is connected with a second glass tube with a certain length through a hose with a spring clamp, and the second glass tube extends into a long tube of a coal dust explosion instrument. Its test method is also disclosed. The device has a simple structure, is convenient to use, and can conveniently and quickly test the explosiveness of the pulverized coal under a certain oxygen concentration.)

1. The utility model provides a pulverized coal explosiveness testing arrangement under different oxygen concentration condition which characterized in that: have the triangular flask of a breather nozzle including the body, the bottleneck of triangular flask is provided with the rubber stopper, bayonet two first glass pipes that are provided with on the rubber stopper, 2 in the lower extreme of first glass pipe all deepened the bottle, 2 the upper end of first glass pipe is respectively through hose connection oxygen cylinder and nitrogen cylinder, just control gas flow's flowmeter is installed in the exit of oxygen cylinder and nitrogen cylinder, the breather nozzle of triangular flask passes through a hose connection second glass pipe that has certain length of taking the spring clamp, just the second glass pipe is visited into in the coal dust explosion appearance long tube.

2. The device for testing the explosiveness of the pulverized coal under the conditions of different oxygen concentrations according to claim 1, characterized in that: the diameter of the first glass tube is 3 mm.

3. The device for testing the explosiveness of the pulverized coal under the conditions of different oxygen concentrations according to claim 1, characterized in that: the lower ends of the 2 first glass tubes are all inserted into the bottle and are 1.5-3cm away from the bottom of the bottle.

4. The device for testing the explosiveness of the pulverized coal under the condition of different oxygen concentrations according to claim 3, characterized in that: the lower ends of the 2 first glass tubes are all inserted into the bottle 2cm far away from the bottom of the bottle.

5. The method for testing the explosiveness of pulverized coal by the device for testing the explosiveness of pulverized coal under the condition of different oxygen concentrations according to any one of claims 3 to 4, comprising the following steps: the method comprises the following steps: the flow of the oxygen cylinder and the flow of the nitrogen cylinder are respectively controlled by the flowmeter, the mixture is fully mixed in the triangular flask until the oxygen reaches the test concentration, the spring clamp is loosened, the mixed gas enters the long tube of the coal powder explosiveness instrument through the second glass tube connected with the vent nozzle of the flask body, and the coal powder explosiveness test is carried out under a certain oxygen concentration.

Technical Field

The invention relates to a device and a method for testing the explosiveness of pulverized coal under different oxygen concentration conditions.

Background

The coal powder explosiveness testing device generally used can only measure the coal powder explosiveness condition under the air condition, and the current blast furnace injection is mainly mixed injection of bituminous coal and anthracite. The use safety of the mixed coal powder after the injection proportion of the bituminous coal is improved is very important, so that the safe use oxygen concentration of the coal powder with different proportions needs to be known in time, and the production economic benefit is improved under the condition of ensuring safe production.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a device and a method for testing the explosiveness of pulverized coal under the condition of different oxygen concentrations, which have the advantages of simple structure and convenience in use, and can conveniently and quickly test the explosiveness of pulverized coal under a certain oxygen concentration.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a pulverized coal explosiveness testing arrangement under different oxygen concentration conditions, has the triangular flask of a breather nozzle including the body, the bottleneck of triangular flask is provided with the rubber stopper, bayonet two first glass pipes that are provided with, 2 on the rubber stopper the lower extreme of first glass pipe all gos deep into in the bottle, 2 hose connection oxygen cylinder and nitrogen cylinder are passed through respectively to the upper end of first glass pipe, just the flowmeter of control gas flow is installed in the exit of oxygen cylinder and nitrogen cylinder, the breather nozzle of triangular flask passes through a hose connection second glass pipe that has certain length of spring clamp, just the second glass pipe is visited in the pulverized coal explosion appearance hose.

Further, the diameter of the first glass tube is 3 mm.

Furthermore, the lower ends of the 2 first glass tubes are all inserted into the bottle and are 1.5-3cm away from the bottom of the bottle.

Furthermore, the lower ends of the 2 first glass tubes are all inserted into the bottle and are 2cm away from the bottom of the bottle.

A method for testing the explosiveness of pulverized coal by a pulverized coal explosiveness testing device under the condition of different oxygen concentrations comprises the following steps: the method comprises the following steps: the flow of the oxygen cylinder and the flow of the nitrogen cylinder are respectively controlled by the flowmeter, the mixture is fully mixed in the triangular flask until the oxygen reaches the test concentration, the spring clamp is loosened, the mixed gas enters the long tube of the coal powder explosiveness instrument through the second glass tube connected with the vent nozzle of the flask body, and the coal powder explosiveness test is carried out under a certain oxygen concentration.

Compared with the prior art, the invention has the beneficial technical effects that:

the structure is simple, and the use is convenient;

controlling the flow of oxygen and nitrogen, fully and uniformly mixing in a triangular flask, feeding the uniformly mixed gas into a long tube of a coal powder explosiveness instrument through a glass tube connected with a bottle body vent nozzle, and carrying out coal powder explosiveness test under a certain oxygen concentration.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic structural diagram of a device for testing explosiveness of pulverized coal under different oxygen concentrations according to the present invention;

description of reference numerals: 1. a triangular flask; 2. a breather nozzle; 3. a rubber stopper; 4. a first glass tube; 5. a second glass tube; 6. a hose; 7. a long pipe of a pulverized coal explosion instrument.

Detailed Description

As shown in figure 1, a pulverized coal explosiveness testing device under different oxygen concentration conditions, including the triangular flask 1 that the body has a breather nozzle 2, the bottleneck of triangular flask 1 is provided with rubber stopper 3, bayonet two first glass pipe 4, 2 that are provided with on rubber stopper 3 the lower extreme of first glass pipe 4 all goes deep into in the bottle, 2 the upper end of first glass pipe 4 is respectively through hose 6 connection oxygen cylinder and nitrogen cylinder, just the flowmeter of control gas flow is installed in the exit of oxygen cylinder and nitrogen cylinder, the breather nozzle of triangular flask 1 passes through 2 hose 6 connection that take the spring clamp and has a certain length second glass pipe 5, just second glass pipe 5 probes into in pulverized coal explosion appearance long tube 7.

The diameter of the first glass tube is 3 mm. The lower ends of the 2 first glass tubes are all inserted into the bottle and are 1.5-3cm, preferably 2cm away from the bottom of the bottle.

Controlling the flow of oxygen and nitrogen, fully and uniformly mixing in the triangular flask 1, and allowing the uniformly mixed gas to enter a long tube of a pulverized coal explosivity meter 7 through a second glass tube 5 connected with a vent nozzle 2 of the flask body to perform pulverized coal explosivity test under a certain oxygen concentration.

A method for testing the explosiveness of pulverized coal by a pulverized coal explosiveness testing device under the condition of different oxygen concentrations comprises the following steps: the method comprises the following steps: the flow of the oxygen cylinder and the flow of the nitrogen cylinder are respectively controlled by the flowmeter, the mixture is fully mixed in the triangular flask until the oxygen reaches the test concentration, the spring clamp is loosened, the mixed gas enters the long tube of the coal powder explosiveness instrument through the second glass tube connected with the vent nozzle of the flask body, and the coal powder explosiveness test is carried out under a certain oxygen concentration.

Example 1

Explosive results of 100% bituminous coal tested at oxygen concentrations of 11% -21%

Oxygen concentration%	21	19	15	13	12	11
							Explosiveness of bituminous coal mm	560-720	560-600	500-540	250-400	40-80	0

Example 2

The explosive result of 70 percent bituminous coal and 30 percent anthracite coal tested under the condition that the oxygen concentration is 11 to 21 percent

Comparative examples 1 and 2:

in example 1, the explosiveness of 100% bituminous coal still has a strong explosiveness characteristic under an oxygen concentration of 15% to 21%, and the explosiveness of bituminous coal gradually decreases after the oxygen concentration decreases to 13%, and becomes weak explosiveness after the oxygen concentration decreases to less than 12%.

In example 2, the explosiveness of the mixed coal powder of 70% bituminous coal and 30% anthracite coal was characterized by weak explosiveness under the condition of 19% oxygen concentration, and the explosiveness of the bituminous coal gradually decreased after the oxygen concentration decreased to 15%, and no longer had explosiveness after the oxygen concentration decreased to 12%.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.